Elon Musk, PayPal Pioneer, Is Paper-Rich, Cash-Poor

NY Times: "Like the fictional Mr. Stark, Mr. Musk seems like the kind of guy every Silicon Valley hopeful wants to be. For starters, he’s a rocket scientist. No, really: he helped design the Falcon 9 booster used by NASA. He also helped create Solar City, a leader in solar power. And he helped dream up the Tesla, the electric car that made electric cars sexy. No wonder the film director Jon Favreau modeled his über-capitalist superhero on Mr. Musk.